diff --git a/src/applications/phortune/provider/PhortuneBalancedPaymentProvider.php b/src/applications/phortune/provider/PhortuneBalancedPaymentProvider.php
--- a/src/applications/phortune/provider/PhortuneBalancedPaymentProvider.php
+++ b/src/applications/phortune/provider/PhortuneBalancedPaymentProvider.php
@@ -182,8 +182,36 @@
   protected function executeRefund(
     PhortuneCharge $charge,
     PhortuneCharge $refund) {
-    // TODO: Implement.
-    throw new PhortuneNotImplementedException($this);
+
+    $root = dirname(phutil_get_library_root('phabricator'));
+    require_once $root.'/externals/httpful/bootstrap.php';
+    require_once $root.'/externals/restful/bootstrap.php';
+    require_once $root.'/externals/balanced-php/bootstrap.php';
+
+    $debit_uri = $charge->getMetadataValue('balanced.debitURI');
+    if (!$debit_uri) {
+      throw new Exception(pht('No Balanced debit URI!'));
+    }
+
+    $refund_cents = $refund
+      ->getAmountAsCurrency()
+      ->negate()
+      ->getValueInUSDCents();
+
+    $params = array(
+      'amount' => $refund_cents,
+    );
+
+    try {
+      Balanced\Settings::$api_key = $this->getSecretKey();
+      $balanced_debit = Balanced\Debit::get($debit_uri);
+      $balanced_refund = $balanced_debit->refunds->create($params);
+    } catch (RESTful\Exceptions\HTTPError $error) {
+      throw new Exception($error->response->body->description);
+    }
+
+    $refund->setMetadataValue('balanced.refundURI', $balanced_refund->uri);
+    $refund->save();
   }
 
   private function getMarketplaceID() {
@@ -217,6 +245,7 @@
 
   /**
    * @phutil-external-symbol class Balanced\Card
+   * @phutil-external-symbol class Balanced\Debit
    * @phutil-external-symbol class Balanced\Settings
    * @phutil-external-symbol class Balanced\Marketplace
    * @phutil-external-symbol class Balanced\APIKey